5. Drag com.microsoft.Messenger.plist and com.microsoft.Messenger.rtc.plist to the trash.

6. Open the Microsoft folder inside the preferences folder, and then drag Microsoft Messenger UserCache.plist to the trash.

For Windows Live Messenger1. Ensure that msnmsgr.exe and wlcomm.exe is completely shut down

a. Go to Task Manager (press Ctrl + Alt + Delete Key to bring up task manager option) b. Go to Processes tab and look for msnmsgr.exe and wlcomm.exe program c. If running, right click on the .exe files and select End process